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arXiv 2401.06259hep-phnucl-exnucl-th
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小 $x$ 下半单举深度非弹性散射(SIDIS)的次领头阶:胶子贡献

SIDIS at small $x$ at next-to-leading order: gluon contribution

Filip Bergabo, Jamal Jalilian-Marian

AI总结:

本研究基于色玻璃凝聚形式体系,在小 $x$ DIS 中以 NLO 精度计算胶子对单举强子产生的贡献,处理共线发散并给出有限 $N_c$ 的 Wilson 线表达式。

摘要:

我们利用 Color Glass Condensate(色玻璃凝聚)形式体系,在小 $x$ 的 Deep Inelastic Scattering(DIS,深度非弹性散射)中,以 next-to-leading order(NLO,次领头阶)精度计算了胶子对单举强子产生的贡献。结果表明,唯一存在的发散是标准的共线发散,它被吸收到胶子—强子碎裂函数的演化中。我们的计算在有限 $N_c$ 下进行,并给出了单举双强子和单强子产生截面中 Wilson 线结构的通用有限 $N_c$ 表达式。我们还评述了如何从所得结果获得强子多重数的快度分布。

英文摘要:

We calculate the contribution of gluons to single inclusive hadron production at next-to-leading order (NLO) accuracy in Deep Inelastic Scattering (DIS) at small $x$ using the Color Glass Condensate formalism. It is shown that the only divergence present is the standard collinear divergence which is absorbed into evolution of gluon-hadron fragmentation function. Our calculations are performed at finite $N_c$ and we provide general finite $N_c$ expressions for the structure of Wilson lines appearing in inclusive dihadron and single hadron production cross sections. We also comment on how one can obtain rapidity distribution of hadron multiplicities from our results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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